CN102954464A

CN102954464A - External-combustion tiny-oil stable-combustion energy-saving combustion device

Info

Publication number: CN102954464A
Application number: CN2011102376400A
Authority: CN
Inventors: 徐军
Original assignee: 徐军
Current assignee: Jiangsu INTN Machinery Manufacturing Co.,Ltd.
Priority date: 2011-08-18
Filing date: 2011-08-18
Publication date: 2013-03-06
Anticipated expiration: 2031-08-18
Also published as: CN102954464B

Abstract

An external-combustion tiny-oil stable-combustion energy-saving combustion device comprises a dense-dilute phase separator, an external-combustion burner nozzle, an ignition oil gun and a flame detection device. The dense-dilute phase separator comprises a cylinder, a tapered rectangular transition pipe and a rectangular pipeline from left to right in terms of shape and starts to be separated into an upper dense-phase pulverized coal passage and a lower dilute-phase pulverized coal passage from the transition pipe by a partition, and the middle is the partition. A cross classified bluff body is disposed at the right top end of the partition, and the external-combustion burner nozzle is disposed on the outer wall of the cross classified bluff body. The external-combustion tiny-oil stable-combustion energy-saving combustion device has super-high low-load stable-combustion capability, capabilities of low-load ignition and cold-state ignition are both considered, low load without oil investment changes between 35% and 48% after the combustion device is modified, and a large amount of combustion-supporting oil is saved; the combustion device has the function of low NOX (nitrogen oxides) combustion emission; and tiny-oil ignition is energy-saving.

Description

The external combustion steady combustion of the oil energy-saving combustion apparatus that declines

Technical field

The present invention relates to a kind of external combustion steady combustion of oil energy-saving combustion apparatus that declines, it is applicable to the combustion system of pulverized coal furnace of hydropower station.

Background technology

At present, the widely used energy-saving combustion form of generating plant pulverized coal boiler is mainly take plasma and tiny-oil ignition as representative, be single fuel-economizing firing technique, ignition principle be Pulverized Coal Concentration to finite concentration, utilize small oil gun or isoionic point detonation, but these two technology do not have low-load combustion-stabilizing and low NO _XCombustion, coal dust excessively concentrated are so that the wear-resisting operating mode of equipment and abominable, and the local temperature of plasma ignition is very high, and the easy oxidization burning loss of burner greatly reduces service life of equipment.

Summary of the invention

Purpose of the present invention will provide a kind of external combustion steady combustion of oil energy-saving combustion apparatus that declines exactly, and it can overcome the existing existing problem of generating plant pulverized coal boiler burner.The object of the present invention is achieved like this, the external combustion steady combustion of the oil energy-saving combustion apparatus that declines, comprise that dense dilute phase separator, external-burning burner nozzle, torch oil gun and fire monitor equipment form, it is characterized in that: dense dilute phase separator profile sets gradually into cylindrical shape, the rectangle transition conduit with tapering, rectangle pipeline from left to right, and to begin to be divided into upper channel by gusset from transition conduit be the dense phase pulverized coal passage, lower channel is dilute phase coal dust passage, and middle is isolation place; The right top of isolation place is provided with cross classification bluff body, is provided with the external-burning burner nozzle on the outer wall of cross classification bluff body; Torch oil gun, fire monitor equipment are inserted into the recirculation zone of cross classification bluff body from the intermediate isolating of dense phase pulverized coal passage, dilute phase coal dust passage.The present invention adopts dense less than the lower channel sectional area of upper channel sectional area, dilute phase isolation technics and bluff body isolation technics, coal dust is through spiral dense phase pulverized coal passage, dilute phase coal dust channel separation, and bluff body carried out classification, form fractional combustion, the heatflow characteristics of bluff body recirculating zone and wake flow recovery district after relying on a wind to open, to form the high-temp combustion thermal source, its stability is higher than the flame holder of oil burner greatly, thereby form more powerful steady combustion ability, take into account underload, the cold conditions igniting, and the expansion coal adaptability, fully satisfy the needs of boiler different load and Coal rank, and possess low NO _XFunction.NO _XGeneration mainly be high temperature and sufficient these two conditions of oxygen, be the general designation of oxynitrides.High temperature and sufficient oxygen must cause NO _XMaximum discharge, adopt the external combustion steady combustion of the oil ignition combustion technology that declines, strengthen the initial stage ignition, improve burner region coal dust firing speed, consuming to greatest extent oxygen, and reduce oxygen supply at air distribution, thereby make the burner region anoxic and suppress NO _XGeneration.

Performance indications are:

1, the de-oiling minimum load 35～48%;

2, boiler cold-state starts fuel-economizing more than 80%;

3, ash content carbon 1～4% fluctuation;

4, applicable Coal rank allows the ature of coal of wide region to change to same burner;

5, low NO _XBurning and exhausting (54%～41.6%).

Economic benefit is:

1, owing to the enhancing of burner low-load combustion-stabilizing ability, it is combustion-supporting to need not to throw oil when the minimum Peak Load of present power industry regulation is 50%, makes oil gun oil mass of underrun minimizing every night, just reduces 800～1500Kg/h oil;

2, small oil gun is directly lighted coal dust, makes the cold start fuel-economizing more than 80%, for some peak regulation factories, and the boiler frequent starting, the fuel-economizing meaning is larger;

3, many coals are adapted to owing to possessed low-load combustion-stabilizing, burning that can be stable, especially to discarded object coal slime and ash up to the gangue more than 50.

Description of drawings:

Fig. 1: be structural representation of the present invention;

Fig. 2: be side-feeding type igniter schematic diagram of the present invention;

1. dense dilute phase separator, 2. transition conduit, 3. surrounding air bellows, 4. dense phase pulverized coal passage, 5. recirculation zone, 6. external-burning burner nozzle, 7. main flow flame, 8. dilute phase coal dust passage, 9. cross classification bluff body, 10. surrounding air entrance, 11. the centre wind entrance, 12. thermocouples, 13. torch oil guns, 14. fire monitor equipment, 15. wear resistant ceramic chips.

The specific embodiment: the invention will be further described below in conjunction with accompanying drawing;

The external combustion steady combustion of the oil energy-saving combustion apparatus that declines, comprise that dense dilute phase separator 1, external-burning burner nozzle 6, torch oil gun 13 and fire monitor equipment 14 form, it is characterized in that: dense dilute phase separator 1 profile sets gradually into cylindrical shape, the rectangle transition conduit 2 with tapering, rectangle pipeline from left to right, and to begin to be divided into upper channel by gusset from transition conduit 2 be dense phase pulverized coal passage 4, lower channel is dilute phase coal dust passage 8, and middle is isolation place; The right top of isolation place is provided with cross classification bluff body 9, is provided with external-burning burner nozzle 6 on the outer wall of cross classification bluff body 9; Torch oil gun 13, fire monitor equipment 14 are inserted into the recirculation zone 5 of cross classification bluff body 9 from the intermediate isolating of dense phase pulverized coal passage 4, dilute phase coal dust passage 8.During implementation, do not change former boiler-burner major function, do not increasing under the prerequisite of a wind resistance system reform of carrying out, relate to the energy-saving and environmental protection of boiler heat-energy combustion parts, surely fire three aspects, pulverized-coal fired boiler energy-conservation is mainly reflected in fuel-economizing, economizes on coal, economizes on electricity; Environmental protection is embodied in SO ₂And NO _XDischarging, the adaptive capacity of the present low-load combustion-stabilizing of combustion stabilizing body and many coals is burners of a kind of energy-efficient, environmental protection.Coal dust is by dense dilute phase separator, form the dense phase pulverized coal passage through 90 ° of rotations, dilute phase coal dust channel separation, coal dust forms the dense phase pulverized coal passage of isolated operation, dilute phase coal dust passage, dense phase pulverized coal is burnt in advance in the bluff body recirculation zone, the design forming coal dust recirculating zone of classification bluff body, the recirculation zone dense phase pulverized coal is heated up rapidly by the high temperature gases recirculating heating, and pulverized coal particle is because of inertia and flow separation gathering, thereby contained fugitive constituent is fully separated out to catch fire, also lighted particle itself, by a small amount of mist of oil of torch oil gun, just can form the very stable source point that catches fire, thereby stablize main flow flame.

Claims

1. the external combustion steady combustion of the oil energy-saving combustion apparatus that declines, comprise that dense dilute phase separator (1), external-burning burner nozzle (6), torch oil gun (13) and fire monitor equipment (14) form, it is characterized in that: dense dilute phase separator (1) profile sets gradually into cylindrical shape from left to right, with rectangle transition conduit (2), the rectangle pipeline of tapering, and to begin to be divided into upper channel by gusset from transition conduit (2) be dense phase pulverized coal passage (4), lower channel is dilute phase coal dust passage (8), and middle is isolation place; The right top of isolation place is provided with cross classification bluff body (9), is provided with external-burning burner nozzle (6) on the outer wall of cross classification bluff body (9); Torch oil gun (13), fire monitor equipment (14) are inserted into the recirculation zone (5) of cross classification bluff body (9) from the intermediate isolating of dense phase pulverized coal passage (4), dilute phase coal dust passage (8).